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Proceedings Paper

X-ray penumbral imaging diagnostic developments at the National Ignition Facility
Author(s): B. Bachmann; H. Abu-Shawareb; N. Alexander; J. Ayers; C. G. Bailey; P. Bell; L. R. Benedetti; D. Bradley; G. Collins; L. Divol; T. Döppner; S. Felker; J. Field; A. Forsman; J. D. Galbraith; C. M. Hardy; T. Hilsabeck; N. Izumi; C. Jarrot; J. Kilkenny; S. Kramer; O. L. Landen; T. Ma; A. MacPhee; N. Masters; S. R. Nagel; A. Pak; P. Patel; L. A. Pickworth; J. E. Ralph; C. Reed; J. R. Rygg; D. B. Thorn
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Paper Abstract

X-ray penumbral imaging has been successfully fielded on a variety of inertial confinement fusion (ICF) capsule implosion experiments on the National Ignition Facility (NIF). We have demonstrated sub-5 μm resolution imaging of stagnated plasma cores (hot spots) at x-ray energies from 6 to 30 keV. These measurements are crucial for improving our understanding of the hot deuterium-tritium fuel assembly, which can be affected by various mechanisms, including complex 3-D perturbations caused by the support tent, fill tube or capsule surface roughness. Here we present the progress on several approaches to improve x-ray penumbral imaging experiments on the NIF. We will discuss experimental setups that include penumbral imaging from multiple lines-of-sight, target mounted penumbral apertures and variably filtered penumbral images. Such setups will improve the signal-to-noise ratio and the spatial imaging resolution, with the goal of enabling spatially resolved measurements of the hot spot electron temperature and material mix in ICF implosions.

Paper Details

Date Published: 26 September 2017
PDF: 11 pages
Proc. SPIE 10390, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI, 103900B (26 September 2017); doi: 10.1117/12.2274611
Show Author Affiliations
B. Bachmann, Lawrence Livermore National Lab. (United States)
H. Abu-Shawareb, General Atomics (United States)
N. Alexander, General Atomics (United States)
J. Ayers, Lawrence Livermore National Lab. (United States)
C. G. Bailey, Lawrence Livermore National Lab. (United States)
P. Bell, Lawrence Livermore National Lab. (United States)
L. R. Benedetti, Lawrence Livermore National Lab. (United States)
D. Bradley, Lawrence Livermore National Lab. (United States)
G. Collins, Univ. of Rochester (United States)
L. Divol, Lawrence Livermore National Lab. (United States)
T. Döppner, Lawrence Livermore National Lab. (United States)
S. Felker, Lawrence Livermore National Lab. (United States)
J. Field, Lawrence Livermore National Lab. (United States)
A. Forsman, General Atomics (United States)
J. D. Galbraith, Lawrence Livermore National Lab. (United States)
C. M. Hardy, Lawrence Livermore National Lab (United States)
T. Hilsabeck, General Atomics (United States)
N. Izumi, Lawrence Livermore National Lab. (United States)
C. Jarrot, Lawrence Livermore National Lab. (United States)
J. Kilkenny, General Atomics (United States)
S. Kramer, Lawrence Livermore National Lab. (United States)
O. L. Landen, Lawrence Livermore National Lab. (United States)
T. Ma, Lawrence Livermore National Lab. (United States)
A. MacPhee, Lawrence Livermore National Lab. (United States)
N. Masters, Lawrence Livermore National Lab. (United States)
S. R. Nagel, Lawrence Livermore National Lab. (United States)
A. Pak, Lawrence Livermore National Lab. (United States)
P. Patel, Lawrence Livermore National Lab. (United States)
L. A. Pickworth, Lawrence Livermore National Lab. (United States)
J. E. Ralph, Lawrence Livermore National Lab. (United States)
C. Reed, General Atomics (United States)
J. R. Rygg, Univ. of Rochester (United States)
D. B. Thorn, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 10390:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI
Jeffrey A. Koch; Gary P. Grim, Editor(s)

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